scholarly journals The simulation analysis of composite parabolic concentrator to improve the performance of thermoelectric devices

2020 ◽  
Vol 191 ◽  
pp. 04001
Author(s):  
Zeming He ◽  
Ming Yang ◽  
Yu Ma ◽  
Ding Ding ◽  
Hang Zhang
Keyword(s):  
High Temperature ◽  
Simulation Analysis ◽  
Radiation Energy ◽  
Focus Of Attention ◽  
Good Choice ◽  
Thermoelectric Device ◽  
Material Consumption ◽  
Optical Technology ◽  
Compound Parabolic Concentrator ◽  
Thermoelectric Model

The collection and reuse of thermal radiation energy generated by high-temperature objects has always been the focus of attention and research. Here we designed and fabricated a compound parabolic concentrator (CPC) that can be used for infrared radiation energy collection based on non-imaging optical technology. The energy gathered by CPC has a significant effect on the improvement of the surface temperature of objects. The thermoelectric (TE) generator is a good choice to utilize this thermal energy. This paper analyses and discusses the effects of CPC on the performance of thermoelectric model by simulation. The result has well demonstrated that the TE model with CPC has not only a considerable reduction in structure size and material consumption, but also ensures higher output power and efficiency. In addition, we propose that the array of CPC shall prominently enhance the performance of thermoelectric device.

scholarly journals Performance Evaluation of Asphalt Rubber Mixture with Additives

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1200 ◽  
Author(s):  
Cheng ◽  
Liu ◽  
Ren ◽  
Huang
Keyword(s):  
High Temperature ◽  
Fatigue Cracking ◽  
Crumb Rubber ◽  
Good Choice ◽  
Environmental Benefits ◽  
Fatigue Properties ◽  
Control Group ◽  
Rubber Mixture ◽  
Asphalt Rubber ◽  
Temperature Performance

Crumb rubber, as a recycled material used in asphalt mixture, has gained more attention in recent years due to environmental benefits and the advantages of its pavement, such as excellent resistance to cracking, improved durability, less road maintenance, lower road noise, etc. However, the high-temperature performance of mixture with crumb rubber does not perform well. In order to improve the performance, this paper examined the effect of additives on the laboratory performance of asphalt rubber Stone Matrix Asphalt (AR-SMA) with additives. Three groups of AR-SMA: no additives, Styrene–Butadiene–Styrene (SBS) and Granular Polymer Durable additive (GPDa) were included, with no additives as a control group. Each group was investigated at three asphalt rubber content (ARC): 6.4%, 6.9%, 7.4% with regard to high-temperature and fatigue properties. The results show that with increasing ARC, the high-temperature performance of mixture without additive decreases, and the high-temperature performance increases first and then decreases for SBS and GPDa. Moreover, the rutting resistance of AR-SMA with GPDa at 6.9% ARC performs best. Under the condition of mixtures with appropriate ARC, AR-SMA with GPDa has higher fatigue life and sensitivity to fatigue cracking than the control group. Simultaneously, the fatigue performance of AR-SMA with GPDa is not as significant as that without additive with increasing ARC. In a word, GPDa is a good choice to improve the performance of AR-SMA. However, it should be noted that optimal asphalt content of AR-SMA mixtures with GPDa is higher than that of traditional mixtures.

High Temperature Thermoelectric Device Concept Using Large Area PN Junctions

2014 ◽  
Vol 43 (6) ◽  
pp. 2376-2383 ◽  
Author(s):  
R. Chavez ◽  
S. Angst ◽  
J. Hall ◽  
J. Stoetzel ◽  
V. Kessler ◽  
...  
Keyword(s):  
High Temperature ◽  
Thermoelectric Device ◽  
Large Area ◽  
Pn Junctions

SiC Power Devices Operation from Cryogenic to High Temperature: Investigation of Various 1.2kV SiC Power Devices

2014 ◽  
Vol 778-780 ◽  
pp. 1122-1125 ◽  
Author(s):  
Thibaut Chailloux ◽  
Cyril Calvez ◽  
Nicolas Thierry-Jebali ◽  
Dominique Planson ◽  
Dominique Tournier
Keyword(s):  
High Temperature ◽  
Cryogenic Temperature ◽  
Good Choice ◽  
Electrical Characteristics ◽  
Power Devices ◽  
Effects Of Temperature

The aim of this study consists in comparing the effects of temperature on various SiC power devices. Electrical characteristics have been measured for temperatures from 100K to 525K. All devices are suitable for high temperature. However, SiC MOSFETs are not a good choice for cryogenic temperature, while SiC BJTs are less affected by temperature than other components, especially for cryogenic temperature.

Ponderomotive pressure effects in laser driven high-temperature plasma flows

1981 ◽  
Vol 25 (2) ◽  
pp. 193-213 ◽  
Author(s):  
J. L. Bobin
Keyword(s):  
High Temperature ◽  
Mach Number ◽  
Energy Density ◽  
Density Ratio ◽  
Radiation Energy ◽  
Pressure Effects ◽  
Initial State ◽  
Temperature Plasma ◽  
Radiation Energy Density ◽  
Plasma Effects

Gasdynamical equations taking radiation energy density and ponderomotive pressure into account are investigated. Conditions for these quantities to be important are stated: low absorption, reflexion at cut-off. The density ratio in a discontinuity is studied as a function of ponderomotive pressure, absorbed intensity and Mach number in the initial state. Chapman–Jouguet conditions are defined. Compressive (R type) flows and rarefaction (D type) appear. The structure of the latter is discussed including plasma effects.

Simulation Analysis of Snubber Circuit for SiC MOSFET Inverter

2014 ◽  
Vol 1070-1072 ◽  
pp. 1241-1245
Author(s):  
Li Jun Xie ◽  
Xian Zheng Liu ◽  
Jin Yuan Li ◽  
Kun Shan Yu
Keyword(s):  
High Temperature ◽  
High Voltage ◽  
High Frequency ◽  
Simulation Analysis ◽  
Pwm Inverter ◽  
Parasitic Inductance ◽  
Power Semiconductor ◽  
Power Semiconductor Devices ◽  
Snubber Circuit ◽  
Parasitic Parameters

SiC MOSFET, as a promising power semiconductor devices, has attracted attention from many laboratories and companies for its super performance in high temperature, high voltage and high frequency applications. To protect the devices from overvoltage induced by parasitic inductance in high frequency applications, snubber circuit is a must. In this paper, simulation of snubber circuit in a high frequency PWM inverter is invested, under different numbers of snubber circuit , parasitic parameters, different kinds of load and whether a SiC SBD exsits. Some useful conclusions are obtained to help design more perfect snubber circuit.

The Design and Simulation of Wide Range Pressure Sensor Based on HTCC for High-Temperature Applications

2014 ◽  
Vol 609-610 ◽  
pp. 1053-1059
Author(s):  
Zhong Ren ◽  
Qiu Lin Tan ◽  
Chen Li ◽  
Tao Luo ◽  
Ting Cai ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Pressure Sensor ◽  
Simulation Analysis ◽  
Zirconia Ceramic ◽  
Passive Measurement ◽  
Series Resonance ◽  
Wide Range ◽  
Spiral Inductors ◽  
Temperature Applications

A wide range pressure sensor is designed based on the theoretical basis of LC series resonance circuit model to realize the wireless passive measurement in the harsh environment, such as high temperature and high pressure. The capacitive pressure sensitive device is devised by the technology of high-temperature co-fired ceramics (HTCC) to form nine density cavities in zirconia ceramic substrates, and thick film technology to print capacitance plates and planar spiral inductors. The theoretical calculation and simulation analysis of the designed sensor are made respectively under high pressure (10MPa) and temperature (600 °C), the results of which verify the feasibility of the design in a wide range of pressure for high-temperature applications, and provide the reliable theory basis for the fabrication of wide range pressure sensor.

CRYODUR 2990

Alloy Digest ◽  
2019 ◽  
Vol 68 (2) ◽  
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Cold Work ◽  
Good Choice ◽  
High Wear Resistance ◽  
High Tempering ◽  
Temperature Performance ◽  
Tempering Resistance

Abstract Cryodur 2990 is a good choice for cutting and shearing tools. The alloy is a cold work steel with hardness, good toughness, and high-tempering resistance combined with high-wear resistance. This datasheet provides information on composition, physical properties, and hardness. It also includes information on high temperature performance and wear resistance. Filing Code: TS-757. Producer or source: Schmolz + Bickenbach.

Design and Simulation Analysis of HTS Wind Generator

2013 ◽  
Vol 312 ◽  
pp. 138-142 ◽  
Author(s):  
Peng Cheng ◽  
Geng Wang ◽  
Peng Qin ◽  
Feng Yan Li
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Permanent Magnet ◽  
Field Distribution ◽  
High Temperature Superconductor ◽  
Simulation Analysis ◽  
Theoretical Research ◽  
Ybco Bulk ◽  
Wind Generator ◽  
The World

With the development of high temperature superconductor (HTS) material, countries all over the world have shown great attention in HTS generator over the theoretical research and application. In this paper, a 3MW high temperature superconductor wind generator has been designed by using the RM and Maxwell 2D module of FEM software Ansoft. This design use the second generation HTS material YBCO bulk to be the permanent magnet. It break through the capability limitation of the traditional permanent magnet generation. Based on the FEM simulating, calculating and changing the parameter, the data of the HTS wind generator has been shown, such as magnet line of force, magnetic-field distribution and so on. Compared with the traditional permanent magnet generation, the HTS wind generator has a strong superiority in various aspects.

Heat Insulation Silicone Coating ANSYS Simulation Analysis

2013 ◽  
Vol 680 ◽  
pp. 402-405
Author(s):  
Zheng Shun Wang ◽  
Zhao Hui Zhen
Keyword(s):  
Heat Transfer ◽  
High Temperature ◽  
Heat Insulation ◽  
Simulation Analysis ◽  
Heat Transfer Analysis ◽  
Ansys Software ◽  
Ansys Simulation ◽  
Silicone Coating ◽  
Resistant Coating ◽  
Heat Preservation

By use of ANSYS software, Without coated high temperature resistant coating and coated with high temperature resistant paint two model to simulate heat transfer analysis, so as to explore the preparation of the high temperature resistant coating insulation heat preservation effect.

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